System and method for agentless computing system configuration management in networked environments. A configuration management service may be implemented as a service on a network with a standard network interface. A client may communicate with the service to specify a configuration for a target system, for example through a browser interface. The specified configuration may be stored by the service. The service may generate a package according to the specified configuration. The package may be delivered to the target system via the network. The package may then install the configuration, for example, one or more software, data, or other digital components, on the target systems in accordance with the specified configuration. The clients may request that the service verify and/or update the installed configuration on the target system. The service may, in response, generate an update package for the installed configuration. Target systems may include computer systems and virtual machines.